vôi sống
Definition
- Noun:
- Quicklime: A white, caustic, alkaline solid (chemical name: calcium oxide, CaO) produced by heating limestone (calcium carbonate) at high temperatures. It reacts violently with water, releasing heat in the process.
Usage Examples
- Noun:
- Vôi sống được sử dụng trong sản xuất xi măng. (Quicklime is used in cement production.)
- Cần cẩn thận khi xử lý vôi sống vì nó có thể gây bỏng. (One must be careful when handling quicklime because it can cause burns.)
- Quá trình thêm nước vào vôi sống được gọi là tôi vôi. (The process of adding water to quicklime is called slaking.)
Advanced Usage
- Chemical Process: The primary use is as an industrial chemical. When water is added, it undergoes a vigorous exothermic reaction to form slaked lime (calcium hydroxide, Ca(OH)₂).
- Phản ứng giữa vôi sống và nước tỏa ra rất nhiều nhiệt. (The reaction between quicklime and water releases a great deal of heat.)
Variants and Related Words
Vôi tôi (n): Slaked lime, hydrated lime (calcium hydroxide, Ca(OH)₂). This is the product formed after quicklime reacts with water.
- Vôi tôi được dùng để cải tạo đất chua. (Slaked lime is used to improve acidic soil.)
Đá vôi (n): Limestone (calcium carbonate, CaCO₃). This is the raw material used to produce quicklime.
- Đá vôi được nung trong lò để sản xuất vôi sống. (Limestone is calcined in a kiln to produce quicklime.)
Synonyms
- Calcium oxide: The precise chemical name.
- Burnt lime: Another common industrial term.
- Caustic lime: Referring to its corrosive, alkaline nature.
Related Concepts
- Calcination: The thermal decomposition process (heating) used to produce quicklime from limestone.
- Exothermic reaction: Describes the heat-releasing reaction of quicklime with water.
- Desiccant: Quicklime is sometimes used as a powerful drying agent due to its strong affinity for water.